Important Topics for GATE 2020 for Revision

Here I am listing Important Topics of Mechanical Engineering for GATE 2020 which will help in revision in this last week before the exam.

1. Engineering Mathematics

• Determinants: Eigenvalue, Eigenvector, System of Linear equations
• Differential equations
• Laplace Transforms
• Probability and statistics
• Numerical methods: Newton Raphson, Ranga Kutta, Trapezoidal 
• Calculus: gradient, multiple integrals
• Complex variables
• Matrix Algebra: Rank calculation, Cayley Hamilton Theorem
• Partial Derivatives 
• Fourier Series

2. Manufacturing Engineering

• Casting : Gating ratio in casting, Solidification time, Pouring time calculation, Casting methods, Sprue design
• Welding : V-I characteristics, Resistance welding calculations, Melting efficiency, Special Welding theory
• Limit, tolerance and fits
• Rolling calculations
• Wire drawing and extrusion calculations
• Sheet metal operations - clearance, force, power, shear calculations
• Machining: Lathe, drilling, milling, shaping cutting time calculations
• Metal Cutting : Theory of metal cutting, Merchant Circle Diagram, Taylor’s Tool life equation
• Grinding and finishing
• Non traditional machining : ECM- MRR and feed calculations, EDM theory, comparison of all NTMM
• NC-CNC machines BLU calculation, M&G codes

3. Fluid Mechanics and Hydraulics

• Fluid Properties: Newton’s law of viscosity
• Fluid Dynamics : Bernoulli’s Equation, Buoyancy and metacentre height
• Fluid Kinematics : Streamline, velocity and acceleration calculations
• Pressure measurements
• Flow measurement : Venturimeter
• Boundary Layer
• Flow through pipes : Laminar flow through pipes and between parallel plates
• Centrifugal pump : Mass flow rate calculation, specific speed
• Turbines : unit quantities, specific speed, Pelton and Francis turbine

4. Theory of Machines

• Mechanisms: Quick return ratio, DOF calculations, Inversion of mechanism, Grashof’s Law
• Velocity & Acc: Coriolis acceleration, Velocity calculation by using I-centres
• Cams - Basic formulae based questions on Cams
• Turning moment of the crankshaft
• Gears - Speed and No. of teeth in epicyclic and compounded gear train
• Vibrations -Frequency calculations for different cases
• Simple balancing questions
• Gyroscope questions- uniform disk and ship cases

5. Strength of Material

• Thermal stresses
• SFD , BMD for propped beam , simple supported and cantilever beams
• Mohr Circle – 2D
• Bending stress equation, Application of torsion equation
• Theories of Failure – MDET and MSST
• Hoop stress and max shear stress in thin pressure vessels
• Simple questions on Euler’s formula for different columns cases
• Stiffness and shear stress of springs

6. Heat Transfer

• Conduction : Conduction heat transfer, Thermal resistance and temperature profile
• Convection : Different numbers used in free and forced convection, Mean bulk temperature
• Radiation : Radiation heat transfer, Radiation heat transfer between infinitely large plates with or without shield ,View factor
• Heat Exchanger : LMTD for counter and parallel flow heat exchangers, LMTD when fluid undergoes phase change, Effectiveness of Heat Exchanger

7. Industrial Engineering

• Forecasting : Simple and weighted moving average forecasting
• Inventory : EOQ and total inventory cost for different models
• PERT: Critical path duration and float
• Queuing Theory : Length and waiting time in queue and system
• Sequencing: Sequencing problems of single machine with multiple jobs
• Assignment problems
• Linear Programming

8. Thermodynamics

• 1st and 2nd Law, Heat and Work transfer calculations for different processes
• Entropy calculation
• Availability calculation
• Clausius – Clapeyron equation
• Properties of Pure substances

9. Machine Design

• Fluctuating Load : Goodman and Soderberg Equation for FOS, S-N curve numerical
• Riveted and Bolted Joints : Max. Stress/ force calculations in riveted and bolted joints
• Bearings: Sommerfeld number, Ball bearing life equivalent load
• Gears: Shoe and block brake numerical, Beam strength equation of gears

10. Engineering Mechanics

• Plane truss
• Lami’s theorem
• Friction especially on inclined planes
• Energy conservation equation

11. Material Science

• Fe-C diagram
• TTT diagram
• Lever rule
• Heat treatment
• Crystal structure - APF
• Crystal Defects - Point and line defects

12. RAC

• VCRS
• Cop of heat pump and refrigerator
• Psychrometry -Relative humidity and humidity ratio calculations

13. IC Engines

• Air standard cycles – efficiency, max temp and pressure, specific fuel consumption /work output
• Fuel gas analysis

14. Power Plant

• Rankine and Brayton cycle
• Degree of reaction

15. Aptitude and English

GATE ME previous years Papers and Solution